Flexible Circuit Board 2layer Cem-3 Stiffener | YSPCB

Flexible Circuit Board process:Plating Through-Hole

Metallization of through-holes.

After drilling， layers have not been connected yet.Flexible pcb manufacturer need to create a conductive layer on the wall of the holes.The plating through-hole processes are just for PCB with two or more layers.

When circuits are too complex for single layer wiring or copper foil is needed for grounding shielding, double-layer or even multilayer boards are needed. The most typical difference between a laminate and a monolayer is the addition of a through-hole structure to connect the layers of copper foil. General substrate + transparent adhesive + copper foil the first processing process is the production of holes. First in the substrate and copper foil drilling, cleaning and plating a certain thickness of copper, and then through the hole is finished. And the next process is almost identical to that of a single board.

Flexible circuits (also variously referred to around the globe as flex circuits, flexible printed circuit boards, flex print, Flexi-circuits) are members of electronic and interconnection family. They consist of a thin insulating polymer film having conductive circuit patterns affixed thereto and typically supplied with a thin polymer coating to protect the conductor circuits. The technology has been used for interconnecting electronic devices since the 1950s in one form or another. It is now one of the most important interconnection technologies in use for the manufacture of many of today's most advanced electronic products.Why Use Flexible Circuits?

Thinking about implementing flex technology in your design? Here are four key reasons to design with flex...

Size

Today's market for electronic interconnect, demands an increased number of I/Os with a high degree of performance and reliability in increasingly miniaturized packages. Constant consideration to further reduce package size is required to support tomorrow’s sophisticated product requirements. Being inherently thin, lightweight, and flexible, flex interconnect facilitates miniaturization, making it a prime candidate for portable devices and applications where space is at a minimum. Flexible PCBs have innate mechanical and electrical properties that make them an ideal selection for emerging applications.

Reliability

Flex circuits are a reliable alternative to conventional wiring. The thin flat conductors and insulation that make up flex circuits provide more surface area than traditional wiring resulting in better heat dissipation and current carrying capacity. Flex circuits offer repeatable reliability and facilitate the replacement of heavy bulky wiring harnesses.

Malleable

Flex circuit technology allows for three-dimensional configurations. Flex circuits have the ability to be formed around obstructions through thin openings and into confined areas. Utilizing Flex circuits for three-dimensional applications increases the reliability and integrity of the electrical connection when connecting to peripheral devices. This is achieved by removing unnecessary plated through-holes or surface-mount pads, which are created to house mechanical connectors.

Performance

Uniform dielectric and conductor thicknesses, favorable dielectric constant and increasingly finer line and spacing geometry provide improved impedance control required for dense, high-speed signal routing.

Cost

If the above factors don't give you reason enough to move to flex circuits, you should also consider the costs involved. Generally speaking, you really do get more for your money with flexible circuit technology. It is not uncommon to replace several electronics components with a single flexible circuit that provides equal to or better performance for your system.